LT1 valve covers 3965543
10-21-2011, 09:40 PM
#1
Racer
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LT1 valve covers 3965543
Hello, I have a set of LT1 valve covers with two three inch intake reliefs? This is the first time I have seen this. I could not find any info or an example. Whats up? Thank you, Al
10-22-2011, 08:43 AM
#2
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If this is the first time you have seen this, you need to be a little more observant.
I have not seen a set of original LT-1 covers that did not have the cut outs. I have seen lots of aftermarket covers without the cut-outs though. (Not that I have seen every LT-1 cover. 
)
I have not seen a set of original LT-1 covers that did not have the cut outs. I have seen lots of aftermarket covers without the cut-outs though. (Not that I have seen every LT-1 cover. )
10-22-2011, 09:17 AM
#3
Race Director
To the best of my knowledge, all of the GM LT-1/L-82 aluminum covers, have the cut outs.
10-22-2011, 10:44 AM
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covers
Hello, I know LT1 and L82 have intake reliefs have cut outs on the valve covers, but what I am saying is I have a set that both reliefs are 3 inches. I have a set of L82s and they have a 5 inch and a three inch relief the ones an E
bay are also 5 inch and 3 inch. I cant recall seeing one that were both were 3 inch only. Just found this info below in the archieves talking about the 3 inch releifs. Ine also has the twist stle oil cap, not the plug. Al
The NCRS manual states "1970-1972 LT1 and 1970 350hp engines have ribbed cast aluminum valve covers with PCV valve provision in both covers.the oil fill cap is on the driver's side and the passenger side cover has a crossed flag emblem where the oil fill hole should be.Original covers have no opening for oil fill on the passenger side and have two 3 inch long slots machined on the inboard edge to clear the intake manifold runners"
bay are also 5 inch and 3 inch. I cant recall seeing one that were both were 3 inch only. Just found this info below in the archieves talking about the 3 inch releifs. Ine also has the twist stle oil cap, not the plug. Al
The NCRS manual states "1970-1972 LT1 and 1970 350hp engines have ribbed cast aluminum valve covers with PCV valve provision in both covers.the oil fill cap is on the driver's side and the passenger side cover has a crossed flag emblem where the oil fill hole should be.Original covers have no opening for oil fill on the passenger side and have two 3 inch long slots machined on the inboard edge to clear the intake manifold runners"
Last edited by Al Davis; 10-22-2011 at 11:02 AM.
10-22-2011, 12:34 PM
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Now I see your point. Guess I should be a bit more observant. I just went out and looked at mime. One is 3 and 3 and the other with the screw in oil fill is 3 and 5. Don't know the numbers on them, and they are not original to the car.
10-22-2011, 03:26 PM
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Hi,
I have a set bought over the counter in 71 with/for a rubber push-in oil cap. Both covers have 2- 3" relief cuts.
Regards,
Alan
I have a set bought over the counter in 71 with/for a rubber push-in oil cap. Both covers have 2- 3" relief cuts.
Regards,
Alan
06-05-2018, 03:12 PM
#8
1969 Corvette & Z28: Cast. # "P-3932418"
Without drippers, "cutouts" are 3" long
1970 Corvette & Z28: Cast # "P-3932417-LH", "P-3965543-LH", "P-3965544-RH"
Drippers are 11/16" wide @ bottom, 3/4" in height, "cutouts" are 3" long
These covers were possibly used on very late 69 Z28's made in Oct. & Nov. 1969.
1971-1972 Corvette & Z28: Cast. # "3989005 L.H.", "3965542 R.H."
Oil cap hole is round for black rubber oil cap, "cutouts" are 3" long
1973-1977 Corvette & 1973-1974 Z28: Cast. # "P 3965543 LH CBC", "P 3965544 RH'
Drippers are 5/8" wide, 5/8" in height, "cutouts" are 3 9/16" and 5" long
06-06-2018, 01:43 AM
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The 71-72 LT-1 valve covers are unique with the push in rubber oil fill cap. And, you can't find them anywhere anymore.
